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Nedeljkovic, M. (author), Visser, J.H.M. (author), Savija, B. (author), Valcke, S.L.A. (author), Schlangen, E. (author)
This paper discusses the state-of-the-art of the fine recycled concrete aggregates (fRCA), focusing on their physical and chemical properties, engineering properties and durability of concretes with fRCA. Based on the systematic review of the published literature, it is impossible to deduce without any further research the guidelines and tools...
article 2021
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Ligterink, N.E. (author), Kadijk, G. (author), Elstgeest, M. (author), van Mensch, P. (author)
With a lifetime of 15 years and more, many vehicles on the European roads no longer have to satisfy durability and in-service conformity requirements. If new cars satisfy stringent on-road emission standard, the risk of significant increase in emissions due to aging, malfunctions, poor maintenance and tampering will be substantial. Even a few...
conference paper 2019
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Visser, J.H.M. (author)
The lack of resistance models to determine the penetration of airborne chlorides into the concrete makes service-life prediction hardly possible for concrete structures exposed to chlorides, something badly needed as airborne chlorides can lead to severe bar corrosion even at 10 km (6 miles) from the sea. Predicting chloride penetration...
conference paper 2018
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Angst, U.M. (author), Geiker, M.R. (author), Michel, A. (author), Gehlen, C. (author), Wong, H. (author), Isgor, O.B. (author), Elsener, B. (author), Hansson, C.M. (author), Francois, R. (author), Hornbostel, K. (author), Polder, R.B. (author), Alonso, M.C. (author), Sanchez, M. (author), Correia, M.J. (author), Criado, M. (author), Sagues, A. (author), Buenfeld, N. (author)
Although the steel–concrete interface (SCI) is widely recognized to influence the durability of reinforced concrete, a systematic overview and detailed documentation of the various aspects of the SCI are lacking. In this paper, we compiled a comprehensive list of possible local characteristics at the SCI and reviewed available information...
article 2017
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Holthuizen, P.E. (author), Çopuroglu, O. (author), Polder, R.B. (author)
In the Netherlands civil engineering structures, such as overpasses, bridges and tunnels are generally built using blast furnace slag cement (BFSC, CEM III/B) concrete, because of its high resistance against chloride penetration. Although the Dutch experience regarding durability performance of BFSC concrete has been remarkably good, its...
conference paper 2017
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Pacheco, J. (author), Polder, R.B. (author)
Chloride induced reinforcement corrosion is the predominant degradation mechanism
article 2016
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Bosch, T. (author), van Eck, J. (author), Knitel, K. (author), de Looze, M.P. (author)
Exoskeletons may form a new strategy to reduce the risk of developing low back pain in stressful jobs. In the present study we examined the potential of a so-called passive exoskeleton on muscle activity, discomfort and endurance time in prolonged forward-bended working postures.Eighteen subjects performed two tasks: a simulated assembly task...
article 2016
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Yang, Z. (author), Fischer, H. (author), Polder, R. (author)
Owing to the unique molecular structure and high ion exchange capacity, hydrotalcites are believed to have a potential to be modified and tailor-made as an active component of mortar and/or concrete. In this paper, two types of modified hydrotalcites (MHT-pAB and MHT-NO2) were incorporated into cement mortars with two dosage levels replacing 5%...
article 2015
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Pacheco, J. (author), Šavija, B. (author), Schlangen, E. (author), Polder, R.B. (author)
The durability of cracked reinforced concrete is a serious concern in the construction industry. Cracks represent fast routes for chloride penetration, which can result in reinforcement corrosion. Bending or tapered cracks have the characteristic of being wider at the surface and becoming narrower towards the reinforcement. In reinforced...
article 2014
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Burghoorn, M.M.A. (author), Roosen-Melsen, D.A. (author), de Riet, J.F.J. (author), Sabik, S. (author), Vroon, Z.A.E.P. (author), Yakimets, I. (author), Buskens, P.J.P. (author)
Anti-reflective coatings (ARCs) are used to lower the reflection of light on the surface of a substrate. Here, we demonstrate that the two main drawbacks of moth eye-structured ARCs-i.e., the lack of suitable coating materials and a process for large area, high volume applications-can be largely eliminated, paving the way for cost-efficient and...
article 2013
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Weltevreden, E.R. (author), van der Heide, E. (author)
When dealing with high-tech equipment, accurate positioning is of the utmost importance to ensure durability and a productive lifetime. Unexpected high friction or wear of positioning mechanisms can lead to unnecessary down-time or products that are not up to specification. To ensure a sufficient lifetime, it is necessary to know beforehand how...
conference paper 2011
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Fischer, H.R. (author), Semprimoschnig, C.O.A. (author)
In this work, a new method, the scanning thermal microscopy method, is applied to study the durability of polymeric materials for space applications. The method was applied to study ground-tested as well as space-retrieved materials. Space-grade silicones, high-temperature polyimides, and the well-known second-surface-mirror-material,...
article 2009
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Ariës, M.B.C. (author), Bluyssen, P.M. (author), TNO Bouw en Ondergrond (author)
Scientists warn us about climate change and its effects on the outdoor environment. These effects can have significant consequences for the indoor environment, also in the Netherlands. Climate changes will affect different aspects of the indoor environment as well as the stakeholders of that indoor environment. Buildings will require less...
article 2009
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Polder, R.B. (author), Larbi, J.A. (author), TNO Bouw en Ondergrond (author)
Explosive spalling of pieces of concrete from the heated surface is considered to be the most dangerous effect of damage of concrete subjected to intense fire attack, especially when it occurs in restricted areas such as underground tunnels. Recent investigations have revealed that the amount of explosive spalling and the extent of cracking can...
article 2007
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de Rooij, M.R. (author), Polder, R.B. (author), van Oosten, H.H. (author), TNO Bouw en Ondergrond (author)
Nowadays important concrete infrastructure is increasingly being designed for long service life by probabilistic assessment of uncertainties, e.g. using the DuraCrete method. Although on paper a reliable and durable structure will result, it is the execution phase that can make or break the service life. Hence, testing the concrete for its...
article 2007
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Lubelli, B. (author), van Hees, R.P.J. (author), Groot, C.J.W.P. (author), TNO Bouw en Ondergrond (author)
In recent years several types of restoration plasters, especially developed for salt loaded substrates, have been introduced on the market. The behaviour of these plasters in the field is, however, not always satisfactory. The reasons for failures may be found both in the moisture and salt transport behaviour of the substrate/plaster combination...
article 2006
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Polder, R.B. (author), de Rooij, M.R. (author), TNO Bouw en Ondergrond (author)
This article presents a series of investigations on six concrete structures along the North Sea coast in The Netherlands. They had ages between 18 and 41 years and most of them were made using Blast Furnace Slag cement. Visual inspections showed corrosion damage in only one structure, related to relatively low cover depths. All structures showed...
article 2005
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Peelen, W.H.A. (author), Polder, R.B. (author), TNO Bouw (author)
Assessment of the durability of prestressed concrete sheet piles under the interference of CP gas pipeline system current, established that due to their low magnitude, these currents do not compromise the required 100-year service life of the structures. The sophisticated numerical modelling tools being developed, are important in assessing...
article 2004
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Sailer, M.F. (author), van Etten, B.D. (author), TNO Bouw (author)
Due to the increasing restrictions in the use of wood preserving biocides a number of potential biocide free wood preserving alternatives are currently assessed. Wood degrading fungi require certain conditions in the wood in order to be able to use wood as a food source. This paper discusses the physiological requirements of wood degrading fungi...
article 2004
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Dubelaar, C.W. (author), Engering, S. (author), van Hees, R.P.J. (author), Koch, R. (author), Lorenz, H.G. (author), TNO Bouw (author)
This study focuses on the differences in lithofacies and petrophysical properties of Base Bed and Whit Bed Portland limestone and the presumed relationships between these characteristics and the durability of this building stone. As Portland limestone probably will be used as a stone for several restoration projects in the Netherlands in the...
article 2003
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